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Allee effects have been applied historically in efforts to understand the low-density population dynamics of rare and endangered species. Many biological invasions likewise experience the phenomenon of decreasing population growth rates at low population densities because most founding populations of introduced nonnative species occur at low densities. In range expansion of established species, the...
Biogeochemical transformations in wetlands impact water quality, nutrient transport across landscapes, and greenhouse gas exchanges with the atmosphere. This study examined anaerobic microbial respiration and methanogenesis in surficial sediments of six wetlands lying on glacial terrain in southwest Michigan, USA. Three of the wetlands were mainly groundwater-fed and three were mainly precipitation-fed...
Exotic invasive species are a mounting threat to native biodiversity, and their effects are gaining more public attention as each new species is detected. Equally important are the dynamics of exotic invasives that are previously well established. While the literature reports many examples of the ability of a newly arrived exotic invader to persist prior to detection and population growth, we focused...
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